For soil-dwelling bacteria that usually live in a carbon-rich and nitrogen-poor environment, the ability to utilize chitin - the second most abundant polysaccharide on earth - is a decisive evolving advantage as it is a source for both elements. Streptomycetes are high-GC Gram-positive soil bacteria that are equipped with a broad arsenal of chitinase-degrading genes. These genes are induced whe...

We prove that a Kleinian group G acting on H3 admits a nonconstant G-automorphic function, even if it has torsion elements, provided that the orders of the elliptic elements are uniformly bounded. This is accomplished by developing a method for meshing distinct fat triangulations which is fatness preserving. We further show how to adapt the proof to higher dimensions.

Analysis of gene expression is assuming an increasingly important role in elucidating the molecular basis of insect biology. Transcriptional regulation of gene expression is directed by a variety of cis-acting DNA elements that control spatial and temporal patterns of expression. This review summarizes current knowledge about properties of transcriptional regulatory elements, based largely on r...

We propose a new conceptual framework to study the dynamics of transposable elements. Based on a genetic algorithm, our model is designed as a self-organizing system. Our results show that transposable elements could emerge from a single endonuclease gene. The DNA repair mechanisms appear to condition the emergence success of class II TEs. Antagonist selective forces acting on transposable elem...

We prove that a Kleinian group G acting upon H admits a nonconstant G-automorphic function, even if it has torsion elements, provided that the orders of the elliptic (torsion) elements are uniformly bounded. This is accomplished by developing a technique for mashing distinct fat triangulations while preserving fatness.

We prove that a Kleinian group G acting upon H admits a nonconstant G-automorphic function, even if it has torsion elements, provided that the orders of the elliptic (i.e torsion) elements are uniformly bounded. This is accomplished by developing a technique for meshing distinct fat triangulations while preserving fatness. We further show how to adapt the proof to higher dimensions.

We have investigated the cis-acting potential of several as elements (20-bp as-l/ocs-like sequences) in both yeast and plant cells. These TCACC[N7]TGACC-resembling elements were surprisingly similar with respect to their ability to confer inducibility by auxins and related compounds to a heterologous TATA box in stably transformed plant cells. Both in plant cells and in yeast it was found that ...

We have investigated the cis-acting potential of several as elements (20-bp as-1/ocs-like sequences) in both yeast and plant cells. These TGACG[N7]TGACG-resembling elements were surprisingly similar with respect to their ability to confer inducibility by auxins and related compounds to a heterologous TATA box in stably transformed plant cells. Both in plant cells and in yeast it was found that ...

Expression of the proto-oncogene c-myc is tightly regulated in vivo. Transcription of c-myc is assumed to be controlled by a number of positive and negative cis-acting control elements located upstream or within exon 1 and intron 1. However, these regulatory elements are not sufficient for c-myc expression after stable transfection or in transgenic mice. Transcription of c-myc in vivo thus requ...